Add oil to skillet saute the ginger and garlic over medium high 30 seconds. Add the pepper and white parts of green onions and cook until softened. Pour in the water and add the brussels sprouts and red pepper flakes. Cook about 4 minutes until sprouts are bright green and softened.
cook the soba noodles as directed and drain. Add the noodles to the vegetables. Mix the miso, oil, and soy sauce together and pour over the noodle mixture. Cook until warmed through. Garnish with the green parts of green onions.